Ventilating fan unit

ABSTRACT

The invention provides a ventilating fan unit insertable into an opening in a windowpane or the like partition and adapted to propel air from the outside atmosphere into a ventilated interior and at the same time to exhaust air from the ventilated interior to the outside atmosphere, which comprises two half shells which cover the outside and inside respectively of said opening and bear with their peripheral edges against opposite sides of the edges thereof to form a gas and liquidtight joint. Each shell is formed with a central recessed portion the floors of which are detachably connected back to back. To said floors a common fan motor is affixed, the two shaft ends of which extend axially into the recessed portions where they carry flow fans. Each fan propels an air stream in countercurrent to the other. The recessed portions are formed with nozzles projecting from the periphery of said portions and extending through the opening in the partition.

United States Patent [111 3,570,386

[72] Inventors Ludwig Baumann St. Gallen, Switzerland; Beuno Schutze,Frankfurt am. Main, Germany [21] Appl. No. 794,569

[22] Filed Jan. 28, 1969 [45] Patented Mar. 16, 1971 [73] Assignee saidSchutze assignor to said Baumann Primary Examiner-William J. WyeAttorney-Lowry, Rinehart & Markva 1 ABSTRACT: The invention provides aventilating fan unit in- Pnomy 8 sertable into an opening in awindowpane or the like partition 1359/68 and adapted to propel air fromthe outside atmosphere into a ventilated interior and at the same timeto exhaust air from the ventilated interior to the outside atmosphere,which comprises [54] VENTILATING FAN UNIT two half shells which coverthe outside and inside respectively 8 Chims4 Drawing Figs of saidopening and bear with their peripheral edges against opposite sides ofthe edges thereof to form a gas and hquid- [52] US. Cl 98/33, tightjointEach shell is formed with a central recessed portion.

. 98/32 the floors of which are detachably connected back to back. To[51] Ill. Cl F24f13/00 Said floors a common fan motor is affixed, thetwo shaft ends [50] Field ol'Search 98/33 of which extend axially intothe recessed portions where they carry flow fans. Each fan propels anair stream in countercur- [56] References Cited rent to the other. Therecessed portions are formed with noz- UNITED STATES PATENTS 98/33 zlesprojecting from the periphery of said portions and extend- 2,l52,6l43/1939 Younger ing through the opening in the partition.

- Patented MarchIG, 1971 I 3,570,386

3 Sheets-Sheet 1 l N V E N TORS wows; BHUMPMN 62 ammo SCHUTZ E ATTORNEYSPatented March 16, 1971 3 Sheets-Sheet 2 I N V E N TO R S LUDWIG BQUMBNN8r BENNU SCHUTZE ATTOR N EYS Patented March 16, 1971 3 Sheets-Sheet 5 AW F s R 0 T N E V N wowa agumuu5- Baum scHuTzE ATTORNEYS vaNrrLA'rrNGFAN UNIT BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION it is theobject of the present invention to provide a ventilating fan unit of theaforedescribed type, in which the turbulent streams that still occur inconventional fan housings are widely eliminated and the streams aregiven'a regular flow path.

To attain this object, the present invention provides a ventilating fanunit insertable into an opening in a windowpane, in a wall or otherpartition and adapted to propel air from the outside atmosphere into aventilated interior and at the same time to exhaust air from theventilated interior to the outside atmosphere, comprising a fan housingcomposed of two half shells covering the outside and inside respectivelyof said opening and bearing with their peripheral edges against oppositesides of the edges thereof to form gastight and liquidtight joints, acentral recessed portion with a floor at its base formed in each of saidhalf shells, the floors of said two recesses being detachably connectedback to back approxi mately inthe plane defined by the abuttingperipheral edges of said half shells, a fan motor afiixed to saidfloors, and having oppositely projecting shaft ends each of whichextends axially into one of said recessed portions, a flow fan securedto each of said shaft ends and adapted to propel an airstream incountercurrent to the other airstream through said fan housing inseparate paths, and at least one nozzle extending from the periphery ofthe recessed portion in each of the half'shells through the opening inthe partition into and through the other half shell.

Advantageously, each of the cylindrical recessed portions may be formedwith at least two nozzles projecting from the periphery of said portion,the nozzles of one recessed portion crossing the nozzles of the otherrecessed portion in the opening in the partition so that the nozzles ofeach recessed portion convey air from the one side to the other side ofsaid partition.

If arelatively small increase in depth of the ventilating fan unit isput up with, all resistances against the flow of the streams can beovercome and the air stream generated by the two flow fans can beconsiderably increased.

In an advantageous embodiment, such increase is attained in that the fanmotor together with the flow fans mounted on the ends of the motor shaftas well as the recessed portions together with their nozzles areinclined within the fan housing with respect to the plane of thepartition so that the nozzles project in the exact centrifugal directionof the flow fans arid extend through the opening in the partition inopposite directions.

Other features of the invention will be understood as the followingparticular description of embodiments of the invention shown in theaccompanying drawings proceeds.

BRIEF DESCRIPTION OF THE DRAWINGS Several embodiments of the inventionwill now be described by way of example and with reference to theaccompanying drawings, in which:

FIG. 1 is a longitudinal section through a ventilating fan unitaccording to the invention;

FIG. 2 is a perspective view showing the cylindrical recessed portions,each of which has one nozzle and which are mounted in the opening in awindowpane;

FIG. 3 is a perspective view similar to FIG. 2 but showing each of thecylindrical recessed portions provided with two nozzles; and

FIG. 4 is a longitudinal section through a ventilating fan unit in whichthe drive members of the unit are arranged in inclined position withrespect to the plane of the windowpane.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The ventilating fan unitproposed by the invention generally comprises two half shells 10 and 11of a fan housing which are so affixed to the inside and outsiderespectively of a corresponding opening 28 cut into a window pane 21,wall or like partition that the edges of the two half shells l0 and 11abut each side of the edges of the opening 28 in the windowpane 21 andthus, with the interposition of sealing rings, form a gastight andliquidtight joint.

Each half shell 10 and 11 is formed with a central cylindrical recessedportion 12 and 13 respectively, and the periphery of each recessedportion is formed with radially projecting nozzles 22 and 23.

In the embodiment illustrated in FIG. 2 each of the recessed portions 12and 13 is formed with one nozzle 22 or 23, respectively, only. In thevicinity of the circumference of the recessed portions 12 and 13, eachof the nozzles 22 and 23 is bent to extend across the width of theperiphery of the adjacent recessed portion if the floors of the tworecessed portions are connected together. However, as shown in FIG. 3,more than one, for example two projecting nozzles 22 and 23 maybearranged to extend across the width of the periphery of each of therecessed portions 12 and 13, said embodiment being particularly suitablefor attachment to a roof. The nozzles 22 of one recessed portion 12cross the nozzles 23 of the other recessed portion 13 in the area of theopening 28 in the windowpane 21 or like partition so that in both casesa passage of the air streams from one to the other side of the partitionis ensured without mutual interference between the two streams. Openings14 are arranged in the floors of the recessed portions 12and 13 andserve to accommodate a fan motor 15, the shaft ends of which projectinto the recessed portions 12 and 13 where they carry flow fans 16 and17. The flow fans 16 and 17 draw in air through lattices 26 or 27 or thelike and propel it through the nozzles 22 or 23 to the respective otherside of the partition. The passage of air through the nozzles 22 and 23may be fully or partly throttled by throttling means in the form offlaps or slides 18 that can be brought into the nozzle cross section.Furthermore, the nozzle ends may receive replaceable filter orelectrical heating means. It should be noted that the recessed portions12 and 13 together with their nozzles 22 and 23 have the same dimensionsand may be producedin one and the same mold so that they may be replacedby each other. The nozzles 22 and 24 are provided with bearings 19 and20 which rest on the edge of the opening in the partition 21 so that theventilation openings 24 and 25 of the half shells 10 and 11 are inalignment with the nozzle ends when the half shells of the fan housingare in operative position.

FIG. 4 illustrates a particularly advantageous embodiment in which thefan motor 15 as well as the two flow fans 16 and 17 mounted on the endsof the motor shaft are so arranged within the fan housing formed by thetwo half shells that they are inclined with respect to the plane of thepartition or window pane 21. The cylindrical recessed portions 12 and 13embracing said flow fans 16 and 17 and the nozzles 22 and 23 are alsoinclined. In this embodiment, the nozzles 22 and 23 extend in the exactcentrifugal direction of the flow fans 16 and 17 and pass in oppositedirection through the partition 21 so that the airstreams generated bythe flow fans flow directly, i.e.without having to take up with anyobstacle or deflection, into the interior and the exterior of a room,respectively.

We claim:

ll. A ventilating fan unit insertable into an opening in a windowpane,in a wall or other partition and adapted to propel air from the outsideatmosphere into a ventilated interior and at the same time to exhaustair from the ventilated interior to the outside atmosphere, comprising:

a. a fan housing composed of two half shells covering the outside andinside respectively of said opening and bearing with their peripheraledges against opposite sides of the edges thereof, to form gastight andliquidtight joints;

b. a central recessed portion with a panel at its base formed in each ofsaid half shells, the panels of said two recessed portions beingdetachably connected back-to-back approximately in the plane defined bythe peripheral edges of said half shells;

c. a fan motor affixed to both said panels and having a shaft transverseto said plane with the oppositely projecting shaft ends each extendingaxially into one of said recessed portions,

d. a flow fan in each of said recessed portions secured to each of saidshaft ends and adapted to propel an airstream in countercurrent to theother airstream through said fan housing in separate paths; and

e. at least one duct extending from the periphery of the recessedportion in each of the half shells through the opening in the partitioninto and through the other half shell.

2. A ventilating fan unit as claimed in claim 1, where each of therecessed portions is formed with at least two ducts projecting from theperiphery of said recessed portion, the ducts of one recessed portioncrossing the nozzles of the other recessed portion in the opening in thepartition so that the ducts of each recessed portion convey air from theone side to the other side of said partition.

3. A ventilating fan unit as claimed in claim 1, comprising throttlingmechanisms in the ducts in the half shells for at least partly shuttingoif said ducts, said ducts being controlled by common actuating means.

4. A ventilating fan unit as claimed in claim 1, comprising replaceablefilter means in the ends of the ducts.

5. A ventilating fan unit as claimed in claim 1, comprising electricalheating means in the ends of the ducts.

6. A ventilating fan unit as claimed in claim 1, wherein the recessedportion of the one half shell together with its duct has the same sizeas the recessed portion of the other half shell together with its duct,both recessed portions being replaceable by each other.

7. A ventilating fan unit as claimed in claim 1, wherein the ductsconstitute bearings resting on the edge of the opening in the partition.

8. A ventilating fan unit as claimed in claim 1, wherein the fan motortogether with the flow fans mounted on the ends of the motor shaft aswell as the recessed portions together with their ducts are inclinedwithin the fan housing with respect to the plane of the partition sothat the ducts project in the exact centrifugal direction of the flowfans and extend through the opening in the partition in oppositedirections.

1. A ventilating fan unit insertable into an opening in a windowpane, ina wall or other partition and adapted to propel air from the outsideatmosphere into a ventilated interior and at the same time to exhaustair from the ventilated interior to the outside atmosphere, comprising:a. a fan housing composed of two half shells covering the outside andinside respectively of said opening and bearing with their peripheraledges against opposite sides of the edges thereof, to form gastight andliquidtight joints; b. a central recessed portion with a panel at itsbase formed in each of said half shells, the panels of said two recessedportions being detachably connected back-to-back approximately in theplane defined by the peripheral edges of said half shells; c. a fanmotor affixed to both said panels and having a shaft transverse to saidplane with the oppositely projecting shaft ends each extending axiallyinto one of said recessed portions, d. a flow fan in each of saidrecessed portions secured to each of said shaft ends and adapted topropel an airstream in countercurrent to the other airstream throughsaid fan housing in separate paths; and e. at least one duct extendingfrom the periphery of the recessed portion in each of the half shellsthrough the opening in the partition into and through the other halfshell.
 2. A ventilating fan unit as claimed in claim 1, where each ofthe recessed portions is formed with at least two ducts projecting fromthe periphery of said recessed portion, the ducts of one recessedportion crossing the nozzles of the other recessed portion in theopening in the partition so that the ducts of each recessed portionconvey air from the one side to the other side of said partition.
 3. Aventilating fan unit as claimed in claim 1, comprising throttlingmechanisms in the ducts in the half shells for at least partly shuttingoff said ducts, said ducts being controlled by common actuating means.4. A ventilating fan unit as claimed in claim 1, comprising replaceablefilter means in the ends of the ducts.
 5. A ventilating fan unit asclaimed in claim 1, comprising electrical heating means in the ends ofthe ducts.
 6. A ventilating fan unit as claimed in claim 1, wherein therecessed portion of the one half shell together with its duct has thesame size as the recessed portion of the other half shell together withits duct, both recessed portions being replaceable by each other.
 7. Aventilating fan unit as claimed in claim 1, wherein the ducts constitutebearings resting on the edge of the opening in the partition.
 8. Aventilating fan unit as claimed in claim 1, wherein the fan motortogether with the flow fans mounted on the ends of the motor shaft aswell as the recessed portions together with their ducts are inclinedwithin the fan housing with respect to the plane of the partition sothat the ducts project in the exact centrifugal direction of the flowfans and extend through the opening in the partition in oppositedirections.